Example usage for java.util Queue offer

Introduction

In this page you can find the example usage for java.util Queue offer.

Prototype

boolean offer(E e);

Source Link

Document

Inserts the specified element into this queue if it is possible to do so immediately without violating capacity restrictions.

Usage

From source file:Main.java

public static void main(String[] args) {
    Queue<String> queue = new LinkedList<String>();
    queue.offer("First");
    queue.offer("Second");
    queue.offer("Third");
    queue.offer("Fourth");

    System.out.println(queue);/*  w  ww  .j  av  a 2 s .  com*/
}

---

From source file:Main.java

public static void main(String[] args) {
    Queue<String> queue = new LinkedList<String>();
    queue.offer("First");
    queue.offer("Second");
    queue.offer("Third");
    queue.offer("Fourth");

    queue.remove();/*from w w w .j av  a2 s.c  o  m*/

    System.out.println(queue);
}

---

From source file:Main.java

public static void main(String[] args) {
    Queue<String> queue = new LinkedList<String>();
    queue.offer("First");
    queue.offer("Second");
    queue.offer("Third");
    queue.offer("Fourth");

    System.out.println("Size: " + queue.size());

    System.out.println("Queue head using peek   : " + queue.peek());
    System.out.println("Queue head using element: " + queue.element());

    Object data;//from www  .  j  av  a2 s .  c  o m
    while ((data = queue.poll()) != null) {
        System.out.println(data);
    }
}

---

From source file:Main.java

public static void main(String[] args) {
    Queue<String> queue = new LinkedList<String>();

    queue.add("A");
    queue.add("B");

    queue.offer("C");
    queue.offer("D");

    System.out.println("remove: " + queue.remove());

    System.out.println("element: " + queue.element());

    System.out.println("poll: " + queue.poll());

    System.out.println("peek: " + queue.peek());
}

---

From source file:Main.java

public static void main(String[] args) {
    Queue<String> queue = new LinkedList<>();
    queue.add("Java");
    // offer() will work the same as add()
    queue.offer("SQL");
    queue.offer("CSS");
    queue.offer("XML");

    System.out.println("Queue: " + queue);

    // Let's remove elements until the queue is empty
    while (queue.peek() != null) {
        System.out.println("Head  Element: " + queue.peek());
        queue.remove();//from  w w w.  jav a 2  s.  com
        System.out.println("Removed one  element from  Queue");
        System.out.println("Queue: " + queue);
    }
    System.out.println("queue.isEmpty(): " + queue.isEmpty());
    System.out.println("queue.peek(): " + queue.peek());
    System.out.println("queue.poll(): " + queue.poll());
    try {
        String str = queue.element();
        System.out.println("queue.element(): " + str);
        str = queue.remove();
        System.out.println("queue.remove(): " + str);
    } catch (NoSuchElementException e) {
        System.out.println("queue.remove(): Queue is  empty.");
    }
}

---

From source file:reactor.logback.DurableLogUtility.java

@SuppressWarnings("unchecked")
public static void main(String... args) throws ParseException, JoranException, IOException {
    Parser parser = new BasicParser();
    CommandLine cl = null;//from   w w w. j  a  va 2 s .  com
    try {
        cl = parser.parse(OPTS, args);
    } catch (ParseException e) {
        HelpFormatter help = new HelpFormatter();
        help.printHelp("dlog", OPTS, true);
        System.exit(-1);
    }

    LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
    loggerContext.reset();

    if (cl.hasOption("config")) {
        // Read Logback configuration
        JoranConfigurator configurator = new JoranConfigurator();
        configurator.setContext(loggerContext);

        configurator.doConfigure(cl.getOptionValue("file", "logback.xml"));

        StatusPrinter.printInCaseOfErrorsOrWarnings(loggerContext);
    } else {
        BasicConfigurator.configure(loggerContext);
    }

    Appender appender = null;
    if (cl.hasOption("output")) {
        String outputAppender = cl.getOptionValue("output", "console");
        appender = loggerContext.getLogger(Logger.ROOT_LOGGER_NAME).getAppender(outputAppender);
    }

    ChronicleTools.warmup();
    Chronicle chronicle = ChronicleQueueBuilder.indexed(cl.getOptionValue("path")).build();
    ExcerptTailer ex = chronicle.createTailer();

    Level level = Level.valueOf(cl.getOptionValue("level", "TRACE"));

    if (cl.hasOption("head")) {
        int lines = Integer.parseInt(cl.getOptionValue("head", "10"));
        for (int i = 0; i < lines; i++) {
            LoggingEvent evt = readLoggingEvent(ex, loggerContext);
            if (evt.getLevel().isGreaterOrEqual(level)) {
                writeEvent(evt, appender);
            }
        }
    } else if (cl.hasOption("tail")) {
        int lines = Integer.parseInt(cl.getOptionValue("tail", "10"));
        Queue<LoggingEvent> tail = new LinkedBlockingQueue<LoggingEvent>(lines);
        while (ex.nextIndex()) {
            LoggingEvent evt = readLoggingEvent(ex, loggerContext);
            if (!tail.offer(evt)) {
                tail.poll();
                tail.add(evt);
            }
        }
        LoggingEvent evt;
        while (null != (evt = tail.poll())) {
            if (evt.getLevel().isGreaterOrEqual(level)) {
                writeEvent(evt, appender);
            }
        }
    } else if (cl.hasOption("search")) {
        String regex = cl.getOptionValue("search");
        Pattern regexPatt = Pattern.compile(regex);
        while (ex.nextIndex()) {
            LoggingEvent evt = readLoggingEvent(ex, loggerContext);
            if (null != evt && evt.getLevel().isGreaterOrEqual(level)) {
                if (regexPatt.matcher(evt.getFormattedMessage()).matches()) {
                    writeEvent(evt, appender);
                }
            }
        }
    }

    loggerContext.stop();
    chronicle.close();
}

---

From source file:Main.java

/**
 * Certain types of queues will fail to {@link java.util.Queue#offer(Object)} an item due to many factors
 * depending on the type of queue. <code>offerUntilSuccess</code> will not return until the item has been
 * successfully queued onto the desired queue
 * @param entry item to queue/*w  w  w  .  j a  v  a 2s  .c  o  m*/
 * @param queue queue to add the entry to
 * @param <T>
 */
public static <T> void offerUntilSuccess(T entry, Queue<T> queue) {
    boolean success;
    do {
        success = queue.offer(entry);
        Thread.yield();
    } while (!success);
}

---

From source file:net.darkmist.clf.Util.java

public static <T> Queue<T> addTo(Queue<T> q, T[] toAdd, int off, int len) {
    int end = Math.min(len + off, toAdd.length);

    for (int c = off; c < end; c++)
        q.offer(toAdd[c]);
    return q;/*from www  .  j a  v a2 s . c om*/
}

---

From source file:net.darkmist.clf.Util.java

public static <U, T> Queue<T> addTo(Queue<T> q, Converter<U, T> converter, U[] toAdd, int off, int len) {
    int end = Math.min(len + off, toAdd.length);

    for (int c = off; c < end; c++)
        q.offer(converter.convert(toAdd[c]));
    return q;/*from   w w w .java 2  s.  c  o m*/
}

---

From source file:com.amalto.core.jobox.util.JoboxUtil.java

public static String parseMainClassFromJCL(String content) throws IOException {
    String mainClass = null;/*from w w w. j  a va2  s .  c om*/
    BufferedReader reader = new BufferedReader(new StringReader(content));
    String line;
    while ((line = reader.readLine()) != null) {
        if (line.length() > 0) {
            boolean hasJAL = false;
            Queue<String> myQueue = new LinkedList<String>();
            String[] tokens = line.split("\\s"); //$NON-NLS-1$
            for (String token : tokens) {
                if (hasJAL && token.trim().length() > 0) {
                    myQueue.offer(token.trim());
                }
                if ("java".equals(token)) { //$NON-NLS-1$
                    hasJAL = true;
                }
            }
            if (hasJAL) {
                String str;
                boolean needConsume = false;
                while ((str = myQueue.poll()) != null) {
                    if (!str.startsWith("-")) { //$NON-NLS-1$
                        if (needConsume) {
                            needConsume = false;// consume
                        } else {
                            mainClass = str;
                            break;
                        }
                    }
                    if (str.startsWith("-")) { //$NON-NLS-1$
                        str = str.substring(1);
                        if (str.startsWith("-")) { //$NON-NLS-1$
                            str = str.substring(1);
                        }
                        // FIXME is there any more?
                        if ("cp".equals(str) || "classpath".equals(str) || "jar".equals(str)) { //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
                            needConsume = true;
                        }
                    }
                }
            }
        }
    }
    return mainClass;
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• »